prompt <what>

  This sets your prompt to ^`what^'. If ^`what^' is ^`\^', then your prompt is set to the default. You can use the following special codes in your prompt:
 
  %h  your health
  %H  your maximum health
  %l  your grade
  %n  your name
  %r  ^Zif you are remorted show the next character, otherwise show the character after that.
  %X  ^Zspecial code for showing mud/location names in window bar. Not supported on all clients.
  %x  same as above but only if known safe.

example:
  >prompt ^^R%h/%H>
  Prompt set.
  ^R123/200>^nsmile
  You ^Ysmile^n.